Bikini Beach Girls At The Daytona 500 NASCAR Sprint Cup Series Race Party, Daytona Beach, Florida, United States

Origins
The race is the direct successor of shorter races held on Daytona Beach. This long square was partially on the sand and also on the highway near the beach. Earlier events featured 200-mile (320 km) races with stock cars. Eventually, a 500-mile (805 km) stock car race was held at Daytona International Speedway in 1959. It was the second 500-miler, following the Southern 500, and has been held every year since. By 1961, it began to be referred to as the "Daytona 500", by which it is still commonly known.
Daytona International Speedway is 2.5 miles (4 km) long and a 500-mile race requires 200 laps to complete. However, the race is considered official after half its distance (100 laps or 250 miles (400 km)) have been completed. The race has been shortened four times due to rain (in 1965, 1966, 2003, and 2009) and once in response to the energy crisis of 1974. It has been extended five times (2005–2007 and 2010–2011) to allow for a green-white-checker finish.